The quality management process — from inspection to CAPA

The quality management process in one loop

The quality management process is a closed loop, not a checklist. In a manufacturing plant it runs from receiving material, through inspection and disposition, into non-conformance handling when something fails, out to corrective action, and back into the planning documents so the same failure is prevented next time. Written as a chain: GRN → inspection → AC/RJ/AD disposition → NCR → 8D → CAPA → FMEA/control-plan amendment → PPAP re-submission. This is not a textbook diagram — it is the sequence a real quality management system executes as linked records, which is what makes the whole chain traceable for an ISO 9001 or IATF 16949 audit.

The six stages, end to end

The front of this loop is planning — APQP and PPAP establish, before the first part is made, what "good" looks like and how it will be controlled. The process described here is what runs every day once a part is in production; the planning cluster feeds it, and it feeds back into the planning documents.

The three inspection points

Inspection is the engine that produces the data the rest of the loop consumes, and a real system keeps its points distinct:

• Incoming (against the GRN) — received material inspected against the store receipt, so accepted and rejected quantities drive stock disposition directly.
• In-process — checks at each operation against the control plan, captured where the work happens, on the work order.
• Final and pre-dispatch — the finished part verified before it leaves the plant.

Every point reads the same specification master for its nominal, upper and lower limits, so inspection and SPC evaluate against one source of truth rather than two sheets that disagree.

Disposition — AC, RJ, AD

The three dispositions are the hinge of the whole process. Each lot is set:

• Accepted (AC) — conforms; the stock or part is released.
• Accepted Under Deviation (AD) — non-conforming but accepted via a formal, bounded concession or deviation.
• Rejected (RJ) — non-conforming; raises a non-conformance and quarantines the stock.

These are not just labels — they drive action. An AC releases stock, an AD records a controlled concession with limits, and an RJ starts the corrective path.

NCR → 8D → CAPA → change: closing the loop

Handled this way, a rejection stops being a silent monthly total and becomes the input to a permanent fix. See the depth in NCR, rejection and 8D/CAPA and documents and change management.

The process as a table

Fast Quality Software runs this exact loop as linked records on one shared platform: incoming inspection ties to a GRN from Fast Production, a complaint escalates into an 8D, and alerts push NCR and calibration events out by email, SMS and WhatsApp — so the whole process is traceable end to end.

Where rework and concessions fit

Not every non-conformance is scrap, and not every one becomes an 8D. A mature process has three exits from a rejection, and the software keeps them distinct so the economics stay honest. A minor, well-understood defect may be dispositioned Accepted Under Deviation — a formal, time- or quantity-bound concession recorded with an approver, never a verbal wave-through. A repairable defect goes to a controlled rework route: a rework process sheet drives the corrective operations and returns the corrected stock to production, so the reworked quantity is tracked rather than quietly re-mixed with good stock. Only a significant or recurring defect escalates into the full 8D. Getting this triage right is what separates a plant that reacts proportionately from one that either scraps too much or hides too much — and it is the practical heart of any effort to reduce rejection and rework.

What each stage produces as audit evidence

The reason to run the process as linked records rather than paper is that each stage leaves an audit-ready trail as a by-product. Incoming inspection produces acceptance and rejection rates by supplier; disposition produces a defensible AC/RJ/AD history per lot; the NCR layer produces a rejection Pareto by defect, process and part; the 8D produces a closed corrective-action record with a dated root cause; and change management produces a re-scored FMEA and an amended control plan. When an ISO 9001 or IATF 16949 auditor asks to see the chain behind a shipped lot, it already exists — nobody reconstructs it. That is the whole payoff of treating quality as a process instead of a set of forms, explored further in the architecture behind a closed-loop QMS.

Frequently asked questions